Maintenance drawer for the combustion chamber and smoke aspiration fan of the flue of a bio-mass powered thermal boiler

ABSTRACT

Maintenance drawer for the combustion chamber and smoke aspiration fan of the flue of a bio-mass powered thermal boiler, characterised by the fact that it is inserted into the front part of the thermal boiler, that it has two compartments, that one compartment is situated under the furnace to collect the ashes, that the other compartment is situated under the aspiration fan to collect the dust contained in the smoke from combustion.

TECHNICAL FIELD OF THE INVENTION

The present invention regards the creation of a maintenance drawer forthe combustion chamber and smoke aspiration fan of the flue of abio-mass powered thermal boiler.

STATE OF THE ART

Biomass thermal boilers need constant maintenance in order to maintain ahigh level of efficiency.

During the combustion of the bio-masses ashes, creosote and dust areproduced. The ashes, dust and the creosote must be continually gatheredand removed in order to avoid the possibility of polluting the bio-masspowered thermal boiler, and thus decreasing their efficiency.

Bio-mass powered thermal boilers are normally fitted with a drawer forthe ashes placed under the furnace, access to which is from the front,and by a drawer which collects the dust from the smoke, access to whichis from the side.

Patent application WO-A-2006109346 describes a thermal boiler with adrawer below the smoke aspiration fan to collect the dust from thesmoke.

Said solution presents a series of inconveniences.

The cleaning of the ash drawer and of the dust drawer is carried outseparately. The ash drawer is fitted in an easily accessible position.The dust drawer is fitted on the lateral part of the thermal boiler,which is generally difficult to access for non-specialized personnel.The user is therefore forced to ask for the intervention of themaintenance service to carry out the cleaning.

The drawer is not easily inspected, in order to be able to eliminate thedust deposited in it.

DESCRIPTION OF THE INVENTION

The present invention proposes the creation of a drawer which allows theuser, with a single operation, to keep the cleaning and maintenance ofthe furnace and aspiration fan under control, freeing the furnace fromthe ashes produced and the smoke aspiration fan free from the dustattracted by the fan itself.

The main object of the present invention is to overcome the difficultiesand disadvantages present in the solutions on sale at present.

The principal aim of the present invention is the creation of drawer forthe maintenance of the combustion chamber and the smoke aspiration fanof the flue of a bio-mass thermal boiler, characterised by the fact thatit is inserted into the front of the thermal boiler, that it has twocompartments, that one compartment is placed under the furnace tocollect the ashes, that the other compartment is placed under theaspiration fan to collect the dust contained in the smoke fromcombustion.

Another characteristic is given by the fact that the compartment forcollecting the ashes is of a parallelepiped shape.

Another characteristic is given by the fact that the compartment forcollecting dust is of a cylindrical shape.

Other characteristics and advantages of the present invention willappear clear from the following description of a method of creating thepresent invention, given as a non-limiting example in the FIGS. 1, 2 and3.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 represents an axonometric view of a thermal boiler in which adrawer, object of the present invention, is placed for the maintenanceof the combustion chamber and smoke aspiration fan of the flue of abio-mass

FIG. 2 represents a section of a thermal boiler in which a drawer,object of the present invention, is placed for the maintenance of thecombustion chamber and the smoke aspiration fan of the flue of abio-mass thermal boiler;

FIG. 3 represents a view of the drawer, object of the present invention,for the maintenance of the combustion chamber and the smoke aspirationfan of the flue of a bio-mass thermal boiler.

DETAILED DESCRIPTION OF AN EMBODIMENT OF THE PRESENT INVENTION

With reference to FIG. 1, which is an axonometric view of a bio-massthermal boiler 1, the door 2, placed in the front part, is visible.

In the front part, as can be seen in FIG. 2, behind the door 2, thedrawer 20 is situated.

The drawer 20 is constituted of a closing and grasping element 21, towhich an element formed of two compartments is attached, the compartmentfor ashes 22 followed by the compartment for dust 23. The drawer 20 isinserted from the front side of the thermal boiler 1, the compartmentfor ashes 22 is situated under the furnace 24 and the compartment fordust 23 is positioned under the smoke aspiration fan 25. The compartment22 creates, with its side in contact with the compartment for dust 23, aperfect seal with the walls of the furnace.

In this way the ashes produced in the furnace 24 fall into the ashcompartment 22 situated under the furnace 24, while the dust produced bythe smoke from combustion is collected in the dust compartment 23,situated under the aspiration fan 25.

To carry out the cleaning and maintenance of the thermal boiler 1 ofashes and smoke dust it is thus necessary to pull out the drawer 20frontally, grasping the closing and grasping element 21, empty therefuse eventually contained both in the compartment 22 and in thecompartment 23 and return the drawer 20 to its place.

The shape of the ash drawer 22 can be of a parallelepiped form, whilethe shape of the dust compartment 23 can be cylindrical in order tobetter adhere to the shape of the aspiration fan.

To always keep both the furnace 1 and the aspiration fan 25 clean it issufficient to periodically repeat the above described cleaning andmaintenance operation, without the necessity for complicated operationsthat necessitate complex dismantling and reassembling.

In this way both the furnace 1 and the aspiration fan 25 of the thermalboiler are kept clean and therefore the efficiency of the thermal boileris always maintained at a high level.

The invention, it should be noted, is not limited to the representationsgiven by the figures, but may be perfected and modified by those skilledin the Art, without, however, exceeding the limits of patent.

The present invention permits numerous advantages and to overcomedifficulties that could not be overcome with the systems on sale atpresent.

1. Maintenance drawer for the combustion chamber and smoke aspirationfan of the flue of a bio-mass powered thermal boiler, characterised bythe fact that it is inserted into the front part of the thermal boiler,that it has two compartments, that one compartment is situated under thefurnace to collect the ashes, that the other compartment is situatedunder the aspiration fan to collect the dust contained in the smoke fromcombustion.
 2. Maintenance drawer for the combustion chamber and smokeaspiration fan of the flue of a bio-mass powered thermal boiler,according to claim 1, characterised by the fact that the drawer forcollecting the ashes is parallelepiped in shape.
 3. Maintenance drawerfor the combustion chamber and smoke aspiration fan of the flue of abio-mass powered thermal boiler, according to claim 1, characterised bythe fact that the drawer for collecting dust is cylindrical in shape.